The professor is skeptical about the idea in the reading passage that ethanol is not a good alternative to gasoline. The professor lists some advantages of ethanol.
First of all, in the reading passage, that the over emitting of carbon dioxide caused by result from increasing use of ethanol would cause global warming. On the contrary, the professor points out that using ethanol actually can reduce global warming. Most of the ethanol fuel are made from plants such as corn which absorbs carbon dioxide as important nutrient for it growth, therefore the carbon dioxide which Ethanol produced can be deducted is removed by the plants when it was growing.
On top of that, the reading passage says the large number of ethanol would reduce the plants accessibility to animal. However, the professor asserts states (我觉得assert是个贬义词有武断的意思)the ethanol is made of cellouse(这个词我也不知道是什么), the essential components of the cell wall, which is not eaten by animals, so the amount of plants the for animal to eat is not reduced at all.(句子不全,加上后边的应该会更清楚。)
Finally, the reading passages states the price of ethanol can not compete with the gasoline in the future. But the professor tells the students once the demand of the ethanol fuel increases, the production of the products will increase, which causeresult in the drop of the price of ethanol. Moreover, a study done recently states if(听原文里应该是个假设) the demand of consumers can be enlarged by three times, consequently and thus the price(原文里好像是cost)of ethanol will decrease by 40% in the future.
|